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Friday, June 29, 2012

Propagation and Monitoring from Melbourne

Latest Solar Data from the Ionospheric Prediction Service in Sydney shows the 10.7 cm Solar Radio Flux down to 90, and the equivalent smoothed sunspot number has fallen to 34.
This activity level is classified by IPS as"low".
So, from my location here in Melbourne, long-haul, multi-hop propagation on frequencies above about 12 MHz will not be very reliable in the immediate future over darkness or partial-darkness paths.
However, daytime propagation during our noon to mid-afternoon period been excellent on 9 MHz and 11 MHz, from all continents. With the shutdown of the Sackville, Canada facility due in a day or so, and Radio Netherlands about to abandon all of its English and Indonesian broadcasts, there will be many gaps in the HF spectrum, which will open up interesting possibilities for serious propagation research as we move through Sunspot Cycle 24.
This is a summary of significant frequency occupancies observed here in Melbourne during our mid-afternoon window on June 27:
7240 RWANDA DW-Kigali English 0430
9800 ROMANIA RRI Russian *0430
9830 MALAYSIA RTM-Kajang Malay 0400
9870 MADAGASCAR V. of the People, Talata, English 0430
11605 S. AFRICA RFI-Meyerton French 0400
11620 CHINA CNR5 0400
11625 MADAGASCAR VR-Talata English *0500
11660 IRAN Arabic 0400
11665 MALAYSIA RTM-Kajang Malay
11670 IRAN Azeri 0430
11680 GERMANY NHK-Wertachtal Japanese 0430
11690 S. AFRICA R. Okapi, Meyerton, French 0400
11745 TAIWAN RA-Taipei Indonesian *0500
11775 ALBANIA CRI-Cerrick Arabic 0500
11800 RWANDA DW-Kigali English *0500
11845 CHINA CNR2 0430
11860 IRAN Turkish *0430
11875 IRAN Hebrew *0430
11905 CHINA CNR6 Amoy 0440
11930 BELARUS Minsk, Belorussian,0415
11935 CHINA CNR5 0400
11940 IRAN Dari 0415
11945 SEYCHELLES BBC English
11960 RUSSIA VOR-Moscow Russian 0400
11980 TURKEY VOT Turkish 0400
12005 TUNISIA Arabic 0430
12045 RWANDA DW-Kigali English *0500
12105 USA WTWW Portuguese 0430, English 0500
12155 ARMENIA VOR-Yerevan Spanish 0330
So, plenty of HF action!
Regards from Melbourne!
Bob Padula

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